L'accessorio Threatgrid non accetta il certificato CA

Introduzione

Quando si aggiunge il contenuto del file di certificato, l'accessorio Threatgrid non accetta il certificato e visualizza il messaggio di errore "Not a client/server CA cert" (Non è un certificato CA client/server). L'errore viene visualizzato nel modo seguente:

Soluzione

È possibile che il certificato in questione non disponga delle estensioni necessarie per essere accettato dall'accessorio Threatgrid. Affinché il certificato CA venga accettato dalla rete di minacce, è necessario che disponga delle estensioni CA corrette. Per verificare quanto segue:

Passaggio 1: Per verificare il certificato, è possibile eseguire questo comando openssl.

openssl x509 -in poke.fireamp.pem -text

Passaggio 2: Il contenuto visualizzato è:

Certificate:
    Data:
        Version: 1 (0x0)
        Serial Number: 0 (0x0)
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = IN, ST = KA, O = MYLAB, OU = MYLAB, CN = root.mylab.com
        Validity
            Not Before: Jun  3 08:55:34 2020 GMT
            Not After : May 29 08:55:34 2040 GMT
        Subject: C = IN, ST = KA, O = MYLAB, OU = MYLAB, CN = dispupd-master3.mylab.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                RSA Public-Key: (2048 bit)
                Modulus:
                    00:9f:4c:cc:c1:0c:bb:88:b0:fb:c0:68:19:a2:36:
                    e4:29:4d:ef:68:23:e2:69:0f:d6:b7:96:7e:f8:80:
                    7a:1f:76:97:42:a4:a0:a5:26:2f:b6:06:67:14:26:
                    df:ab:50:c0:fc:ec:e4:02:7b:ca:86:cf:99:8e:43:
                    1d:d3:51:4b:0a:7e:ca:46:5a:9f:f2:68:ae:3d:c5:
                    a1:ab:3b:bb:c3:83:c3:a1:61:83:1e:1e:d6:ab:13:
                    a3:b1:51:b0:15:f4:a1:11:89:e6:79:0f:ae:89:6b:
                    5b:ec:74:4d:75:00:60:59:06:49:f1:f5:7c:b8:70:
                    67:29:fc:fb:81:88:cd:cf:a9:6e:8f:b6:02:b1:58:
                    02:8c:41:73:9f:7c:fc:9b:37:b4:1f:bd:28:7b:ca:
                    90:5e:97:7f:4f:40:0e:be:e3:55:cc:dc:32:fb:5a:
                    ef:c0:40:83:ab:20:c5:28:c1:ca:c5:54:b5:c3:87:
                    ec:79:be:6e:46:e5:44:56:fc:ab:9b:5f:f5:a3:8b:
                    06:e3:b3:29:09:bd:76:96:ba:22:09:85:c5:e2:50:
                    e2:d9:10:f2:58:42:be:99:be:5f:6c:eb:82:dc:3e:
                    d0:d3:a5:b4:c6:d5:7a:e6:1a:e8:cc:dc:19:b9:c8:
                    0c:8c:8c:87:a5:d5:0d:d1:d4:1b:a6:14:4f:29:68:
                    82:cf
                Exponent: 65537 (0x10001)
    Signature Algorithm: sha256WithRSAEncryption
         4a:1f:00:60:fe:0b:0b:e0:02:f8:85:6e:ff:e6:73:92:7a:3f:
         4c:46:89:36:84:51:f1:f8:73:9a:b6:6e:83:54:92:48:f4:df:
         df:10:d8:c4:f2:36:38:fd:0e:1b:9c:ef:f7:91:c3:90:db:cc:
         ec:84:a0:45:9b:35:85:d9:39:10:e6:01:e9:6c:ab:29:c7:0b:
         57:12:b4:cb:bd:cf:ae:1c:3a:ff:a1:7d:b7:d4:b2:98:53:7b:
         d9:25:11:40:72:1b:ce:90:dd:3e:c8:3c:9f:bf:5b:f5:78:d0:
         be:66:b9:d2:ed:d3:c8:71:1d:75:b7:29:37:17:5f:e3:63:68:
         51:1d:30:7b:1d:45:67:b2:71:61:59:39:26:19:aa:87:d7:f1:
         07:b1:3b:68:b0:1a:5a:9f:61:e3:55:ae:31:80:dc:46:e5:4a:
         46:f7:12:6b:1b:8f:b5:68:bf:00:56:66:6a:c6:b2:d9:7a:ea:
         61:de:15:72:eb:3b:49:d1:55:bc:9d:6c:8b:05:36:82:f7:b8:
         12:ac:c9:f0:e9:1c:8b:60:2d:cf:61:8b:4f:7c:3f:89:e0:05:
         e4:58:a8:22:13:74:76:7a:86:20:b2:8c:ae:cc:68:28:56:63:
         df:ac:85:29:5b:e4:2b:8e:98:36:75:71:6f:48:3a:af:4c:8f:
         4e:57:c5:ce

Passaggio 3: indica che le estensioni CA non sono presenti. Estensioni previste da visualizzare nel certificato CA.

            X509v3 Basic Constraints: critical
                CA:TRUE

Passaggio 4: Verificare che il certificato disponga di tali estensioni e, in caso contrario, chiedere al provider di certificati di condividere il certificato CA con tali estensioni. Se il certificato è stato creato con OpenSSL, questi comandi consentono di generare il certificato CA con le estensioni corrette.

openssl genrsa -out rootCA.key 2048

openssl req \
-addext basicConstraints=critical,CA:TRUE\
-outform pem -out rootCA.pem \
-key rootCA.key -new -x509 \
-days "1000"

Passaggio 5: Di seguito è riportato un esempio di un certificato accettabile:

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            56:e4:2f:5a:f3:21:e2:17:43:13:cb:21:b3:30:16:cb:37:12:54:c6
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = AU, ST = Some-State, O = Internet Widgits Pty Ltd
        Validity
            Not Before: Nov 17 08:50:01 2020 GMT
            Not After : Aug 14 08:50:01 2023 GMT
        Subject: C = AU, ST = Some-State, O = Internet Widgits Pty Ltd
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                RSA Public-Key: (2048 bit)
                Modulus:
                    00:cb:1a:3d:db:4f:5d:15:4f:e7:75:37:ae:ac:a4:
                    dc:de:9d:67:34:6d:ca:d4:9a:e4:26:73:d0:08:90:
                    0f:0d:bc:16:0f:9c:bb:7d:7e:e0:39:36:78:0f:19:
                    b0:c1:6a:20:33:96:f9:70:f0:7d:33:74:79:8a:a1:
                    f8:aa:a4:81:50:dc:e7:5a:b7:4d:6a:4a:d6:aa:5a:
                    59:d7:58:05:1c:14:d3:03:01:c5:cd:ce:a5:bd:68:
                    be:c2:31:e1:3a:75:58:f3:5f:fe:c2:38:4e:5f:df:
                    be:9b:ad:e5:a0:81:41:41:ff:45:90:3c:20:1c:5b:
                    35:0b:9e:8c:79:49:f6:da:c0:85:df:6f:b7:e3:2c:
                    e4:fc:2e:08:ff:97:f3:e0:10:ff:3f:79:92:c9:19:
                    ee:96:46:2c:07:bc:b4:16:88:f3:0e:98:dd:4e:07:
                    e6:7c:34:9d:a9:71:5a:61:a3:ba:d5:d1:a1:0f:e9:
                    e2:7d:45:71:36:6e:2d:57:ee:0b:1a:80:c3:e8:76:
                    29:ed:e2:25:94:0b:4f:9d:01:35:fa:b9:91:e4:1f:
                    00:17:54:46:d1:2d:62:a1:7c:a2:bd:e0:67:fc:43:
                    c0:55:e7:82:86:88:34:11:66:0b:85:1a:c5:c0:87:
                    ce:eb:b8:47:6d:4b:24:cd:4a:ab:e1:90:5f:1f:89:
                    10:a1
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Subject Key Identifier:
                5C:2D:62:32:41:0A:5C:EB:4C:CF:41:A9:FB:81:F9:C1:D9:05:03:3D
            X509v3 Authority Key Identifier:
                keyid:5C:2D:62:32:41:0A:5C:EB:4C:CF:41:A9:FB:81:F9:C1:D9:05:03:3D

            X509v3 Basic Constraints: critical
                CA:TRUE
       
    Signature Algorithm: sha256WithRSAEncryption
         1c:a4:5d:2e:71:2d:3d:74:98:f4:0e:d1:39:7e:ae:bc:cf:fb:
         6c:7a:19:e6:f5:1e:57:0a:93:91:03:4f:9d:02:fb:f9:b7:f4:
         64:92:a2:aa:33:34:2d:5a:52:bc:7c:b6:b1:a0:59:d3:98:72:
         dd:c6:d2:e5:8c:e0:8b:87:60:44:c8:2c:ad:20:3d:9f:83:b1:
         53:e7:22:bc:85:64:fe:b3:11:90:fb:68:1f:ba:04:bd:1a:8f:
         dd:02:5d:aa:42:9b:9c:7f:5e:95:63:5f:07:65:b9:0d:83:0c:
         a4:f6:48:d4:74:fc:bc:93:9f:79:68:9b:30:d8:c0:e4:d2:d7:
         42:aa:fb:43:ef:40:4a:17:9d:3a:6f:50:24:c1:52:74:15:07:
         50:82:64:60:20:e1:ec:85:72:11:14:4e:bd:44:a2:74:92:db:
         30:d2:32:98:a7:f3:c2:47:b4:f5:6c:60:6d:0e:50:87:75:c7:
         a3:a4:5d:25:96:58:43:bb:2b:c4:6c:ea:f1:88:f4:b1:29:22:
         0b:cd:03:64:b8:fb:65:cf:29:62:59:ec:b8:b8:33:09:58:cf:
         f5:67:2e:f4:b4:7d:de:84:e3:05:84:b8:91:2c:a1:32:af:44:
         fa:2d:3e:c3:01:72:c9:56:c9:f0:ce:5e:28:61:f1:79:56:68:
         36:f3:bb:21